--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/3rdparty/phonon/ds9/audiooutput.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,111 @@
+/*  This file is part of the KDE project.
+
+Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+
+This library is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 2.1 or 3 of the License.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this library.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "audiooutput.h"
+#include "mediaobject.h"
+
+#include <QtCore/qmath.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Phonon
+{
+    namespace DS9
+    {
+        AudioOutput::AudioOutput(Backend *back, QObject *parent)
+            : BackendNode(parent), m_currentIndex(0), m_crossfadeProgress(1.),
+              m_device(-1), m_backend(back), m_volume(0.)
+        {
+        }
+
+        AudioOutput::~AudioOutput()
+        {
+        }
+
+        int AudioOutput::outputDevice() const
+        {
+            return m_device;
+        }
+
+        static const qreal log10over20 = qreal(0.1151292546497022842); // ln(10) / 20
+
+        void AudioOutput::setVolume(qreal newVolume)
+        {
+            for(int i = 0; i < FILTER_COUNT; ++i) {
+                ComPointer<IBasicAudio> audio(m_filters[i], IID_IBasicAudio);
+                if (audio) {
+                    const qreal currentVolume = newVolume * (m_currentIndex == i ? m_crossfadeProgress : 1-m_crossfadeProgress);
+                    const qreal newDbVolume = (qMax(0., 1.-::log(::pow(currentVolume, -log10over20)))-1.) * 10000;
+                    audio->put_Volume(qRound(newDbVolume));
+                }
+            }
+
+            if (m_volume != newVolume) {
+                m_volume = newVolume;
+                emit volumeChanged(newVolume);
+            }
+        }
+
+        void AudioOutput::setCrossFadingProgress(short currentIndex, qreal progress)
+        {
+            m_crossfadeProgress = progress;
+            m_currentIndex = currentIndex;
+            setVolume(m_volume);
+        }
+
+        bool AudioOutput::setOutputDevice(const AudioOutputDevice & newDevice)
+        {
+            //stub implementation
+            return setOutputDevice(newDevice.index());
+        }
+
+        qreal AudioOutput::volume() const
+        {
+            return m_volume;
+        }
+
+        bool AudioOutput::setOutputDevice(int newDevice)
+        {
+            if (newDevice == m_device) {
+                return true;
+            }
+
+            //free the previous one if it was already set
+            for(int i = 0; i < FILTER_COUNT; ++i) {
+                const Filter &oldFilter = m_filters[i];
+
+                Filter newFilter = m_backend->getAudioOutputFilter(newDevice);
+
+                if (m_mediaObject && oldFilter && newFilter) {
+                    m_mediaObject->switchFilters(i, oldFilter, newFilter);
+                }
+
+                m_filters[i] = newFilter; 
+
+
+            }
+
+            m_device = newDevice;
+            setVolume(m_volume);
+            return true;
+        }
+    }
+}
+
+QT_END_NAMESPACE
+
+#include "moc_audiooutput.cpp"